Charles l



UNITED STATES PATENT OEETCE.

CHARLES L. .SPENCER,OF PROVIDENCE, RHODE ISLAND.

APPARATUS FOR CONVERTING A RECIPROCATING INTO ROTARY MOTION.

Specification forming part of Letters Patent No. 87,217, dated February23, 1869.

2, 3, 4, 5, 6, and 7 are detailed parts.

In the accompanying drawing, C7 Fig. 2, is a cup, cast with two hubs,the outer one having a set-screw fitted to it for fastening to a shaft.The inner hub is turned true with the inside surface of the flange ofcup C. 0n this hub is iitted loosely the disk E, Fig. 4. This disk ismade with a hub extending from its center, andl to it the cam D, Fig. 5,is fitted with an oval hole, so as to be independent of 4and slide uponthe face of disk E,and it is held from turning by two studs, as shown inFig. 3, these studs being attached to or cast on disk E, as shown inFig. 4.

The lower surface of cam D1 is made concentric with the inside surfaceof liange on cup C, as shown in section, Fig. 6, and such.

cam D, in combination with a roller or some equivalent device for thesame purpose acting with a spring, forms a compound pawl, which, whenused in connection with connecting-rods attached to a treadle, Fig. 1,enables a reciprocating motion to be converted into a rotary motion inone direction.

A device for a similar purpose, consisting of a suitable roller andspring, used together with cup C and a fixed instead of an independentcam, riveted or cast on disk E, is shown in Letters Patent issued to meSeptember 29,1863, No. 1,547, antdated, March 4, 1862. In that inventionreliance is had entirely upon anti-friction rollers in combination fwith such fixed cam.

By such arrangement, which is no part of my present improvement, whenthe rollers become worn (which is often the case) they slip on the innersurface of the flange on cup C, and the desired eiectwill not beproduced.

My improvement consists in a device obviating this defect, by securing agreater frictionsurface, and is obtained by the use of an independentcam, D, constructed and arrangedas above described, 1n con'nection witha suitable wedge or roller in combination with the disk E and cup C, sothat the lower or periphery surface of cam D is pressed against theinner surface of liange on cup C, holding the whole clutched togetherwhen moving in one direction, and liberated when moving in the oppositedirection.

With this improvement there is no liability of slipping in case of thewearing of the roller,

as the cam D can be made wide enough on its lower surface to pressagainst one-'third of the circumference of ange on. cup C, thus makingapowerful friction clutching-pam,-

being available for indefinite applications or purposes in producingrotary motion.

What I claim as my invention, and desire to secure by Letters Patent ofthe United States, is-

The independent cam D, in connection with a suitable binding-roller andspring, Fig. 7, or equivalent device, in combination with disk E and cupC, the whole being arranged to operate substantially as described, andfor the purposes specified. 4

CHARLES L. SPENCER.

Witnesses:

GEO. H. LINCOLN, GEO. R. BURDoN.

